CN210384017U - Self-breaking double-lock nut device for pedicle screw - Google Patents
Self-breaking double-lock nut device for pedicle screw Download PDFInfo
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- CN210384017U CN210384017U CN201920670873.1U CN201920670873U CN210384017U CN 210384017 U CN210384017 U CN 210384017U CN 201920670873 U CN201920670873 U CN 201920670873U CN 210384017 U CN210384017 U CN 210384017U
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Abstract
The utility model discloses a self-breaking double-lock nut device used for pedicle screws, which comprises a locking seat and a self-breaking screw rod; the outer peripheral wall of the locking seat is provided with external threads, the locking seat is provided with a through groove which penetrates up and down, and the through groove is provided with internal threads; the self-breaking screw comprises a screw section and a self-breaking part fixedly connected with the screw section, wherein the fixedly connected self-breaking part can be automatically broken when the locking force is greater than a preset value, and the screw section is provided with an outer flange; the self-breaking screw rod passes through the through groove of the locking seat from bottom to top, the screw rod section is in threaded connection with the through groove, and the locking seat can be propped against the outer flange of the screw rod section. It has the following advantages: the bolt joint of the locking seat and the nail seat, the bolt joint of the self-breaking screw rod and the nut and the self-breaking screw rod can be combined together, the advantages of double lock and self-breaking are combined, the double lock effect can be achieved, the self-breaking effect can be achieved, the phenomenon of explosion of the lock is avoided, and the damage of threaded connection is avoided.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a be used in two lock nut devices of autotomying of pedicle of vertebral arch screw.
Background
The pedicle screw comprises a screw seat, a screw body, a pressing block and a locking seat. This nail seat is equipped with the nail cover, and this nail cover is equipped with the mounting groove that runs through from top to bottom, this nail body coupling this mounting groove, and this nail cover top surface is concave to be equipped with and runs through the groove, and it is perpendicular with this mounting groove running through direction that should run through the groove, and this compact heap is established in the nail cover, and this run-on seat passes through threaded connection and runs through groove upper portion, and wherein, this run-on seat, compact heap and run-on seat cooperation form the mounting structure that can install the barred body (implant axle). Chinese patent database discloses an invention application with publication number CN101553178A on 7/10/2009, which was invented and named as keyed crown part positioning for multi-axial screws. In the invention, the top of the locking seat is provided with a breaking part, and the breaking part is automatically broken relative to the locking seat when the locking force exceeds a preset value in the installation process, so that the locking explosion phenomenon is avoided, and the threaded connection is prevented from being damaged.
SUMMERY OF THE UTILITY MODEL
The utility model provides a be used in two lock nut devices of autotomying of pedicle of vertebral arch screw, it has overcome and has been used in the not enough that two lock nut devices of autotomying of pedicle of vertebral arch screw exist in the background art.
The utility model provides an adopted technical scheme of its technical problem is:
the self-breaking double-lock nut device for the pedicle screw comprises a locking seat and a self-breaking screw rod; the outer peripheral wall of the locking seat is provided with external threads, the locking seat is provided with a through groove which penetrates up and down, and the through groove is provided with internal threads; the self-breaking screw comprises a screw section and a self-breaking part fixedly connected with the screw section, wherein the fixedly connected self-breaking part can be automatically broken when the locking force is greater than a preset value, and the screw section is provided with an outer flange; the self-breaking screw rod passes through the through groove of the locking seat from bottom to top, the screw rod section is in threaded connection with the through groove, and the locking seat can be propped against the outer flange of the screw rod section.
In one embodiment: the bottom of the screw section is annularly protruded outwards to form the outer flange, and the outer flange is of an annularly protruded structure.
In one embodiment: an outer conical wall with a small upper part and a large lower part is arranged outside the screw section, the outer conical wall is positioned on the outer flange, and an inner conical wall matched with the outer conical wall is arranged at the bottom of the penetrating groove.
In one embodiment: the bottom surface of the locking seat is concavely provided with a groove, the bottom of the groove is concavely provided with the through groove, and the bottom of the groove is supported against the outer flange.
In one embodiment: still include the compact heap, this compact heap is equipped with the through-hole, and this from breaking screw rod up passes the through-hole of compact heap and the through groove and the screw rod section spiro union of lock connection seat from bottom to top and is passing through the groove, and this lock connection seat, compact heap and outward flange prop according to the preface and lean on from top to bottom.
In one embodiment: the bottom surface of the locking seat is concavely provided with a groove, the bottom of the groove is concavely provided with the through groove, the bottom of the groove is supported on the pressing block, and the pressing block is propped against the outer flange.
In one embodiment: the pressing block comprises an inner ring portion, a middle ring wall and an outer ring portion, wherein the middle ring wall extends downwards from the outer periphery of the inner ring portion, and the outer ring portion extends outwards from the lower periphery of the middle ring wall.
In one embodiment: the bottom surface of the locking seat is concavely provided with a groove, and the bottom of the groove is concavely provided with the through groove; the bottom surface of the locking seat is supported on the outer ring part, and the inner ring part is propped against the outer flange.
In one embodiment: the outer peripheral edge of the outer ring portion extends downwards to form an outer peripheral wall, and an arc-shaped notch is concavely formed in the bottom wall of the outer peripheral wall.
Compared with the background technology, the technical scheme has the following advantages:
the bolt joint of the locking seat and the nail seat, the bolt joint of the self-breaking screw rod and the nut and the self-breaking screw rod can be combined together, the advantages of double lock and self-breaking are combined, the double lock effect can be achieved, the self-breaking effect can be achieved, the phenomenon of explosion of the lock is avoided, and the damage of threaded connection is avoided.
The outer flange is of a ring convex structure, the support is stable and reliable, and the locking performance is improved.
The groove bottom of the groove is concavely provided with a through groove, and the groove bottom is supported on the outer flange, so that the assembly is convenient, and the structure is compact.
The self-breaking screw rod penetrates through the through hole of the pressing block and the through groove of the locking seat from bottom to top, the screw rod section is in threaded connection with the through groove, and the locking seat, the pressing block and the outer flange are sequentially supported and leaned up and down, so that the locking performance is improved.
The pressing block comprises an inner ring portion, a middle ring wall extending downwards from the outer periphery of the inner ring portion and an outer ring portion extending outwards from the lower periphery of the middle ring wall, the structure is simple, and the locking performance is improved.
Drawings
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Fig. 1 is a schematic structural view of a self-breaking double lock nut device according to an embodiment.
Fig. 2 is a schematic cross-sectional view of a self-breaking double lock nut assembly according to an embodiment.
Fig. 3 is an exploded perspective view of a self-breaking double lock nut device according to an embodiment.
Fig. 4 is a schematic structural diagram of a second self-breaking double-lock nut device according to an embodiment.
Fig. 5 is a second schematic structural view of the second self-breaking double-lock nut device according to the second embodiment.
Fig. 6 is a schematic cross-sectional view of a second self-breaking double lock nut device according to an embodiment.
Fig. 7 is a perspective exploded view of the third self-breaking double lock nut device according to the embodiment.
Detailed Description
Example one
Referring to fig. 1 to 3, the self-breaking double lock nut device for pedicle screws includes a self-breaking screw 2 of a locking seat 1.
This 1 periphery wall of halving seat is equipped with external screw thread 11, and the run-through groove 12 that runs through about this halving seat 1 establishes, and this run-through groove is equipped with the internal thread, in the concrete structure: the bottom surface of the locking seat 1 is concavely provided with a groove 121, and the bottom of the groove 121 is concavely provided with the through groove 12. The self-breaking screw 2 comprises a screw section 21 and a self-breaking part 22 fixedly connected with the screw section 21 and capable of being broken automatically when the locking force is greater than a preset value, the screw section 21 is provided with an outer flange 211, in the specific structure, the bottom of the screw section 21 protrudes annularly and outwards to form the outer flange 211, and the outer flange 211 is in an annular protruding structure; the self-breaking screw 2 passes through the through groove 12 of the locking seat 2 from bottom to top, the screw section 21 is screwed in the through groove 12, and the bottom of the locking seat 1 is supported on the outer flange 211 of the screw section 21.
In this embodiment, the screw section 21 is further provided with an outer tapered wall 212 having a small top and a large bottom, the outer tapered wall 212 is located above the outer flange 211, and preferably, a cylindrical wall 213 is provided between the outer tapered wall and the outer flange; the bottom of the through groove 12 is provided with an inner conical wall 122 adapted to the outer conical wall, on one hand, the inner conical wall can be used for guiding and facilitating assembly, and on the other hand, the supporting force can be enhanced.
The self-breaking structure in the self-breaking screw rod is as follows: the external wall of the fixed connection part of the self-breaking part and the screw section is concavely provided with an annular groove 23, so that the fixed connection part forms a self-breaking position, and the self-breaking part can be broken off at the self-breaking position when the pretightening force is larger than a set value.
Example two
Referring to fig. 4 to fig. 7, the difference between the embodiments is: and also comprises a compact 3.
The pressing block 3 is provided with a through hole, the self-breaking screw 2 penetrates through the through hole of the pressing block 3 and the through groove 12 of the locking seat 1 from bottom to top, the screw section 21 is screwed in the through groove 12, and the locking seat, the pressing block and the outer flange are sequentially supported up and down.
The pressing block 3 includes an inner ring portion 34, a middle ring wall extending downward from the outer periphery of the inner ring portion, and an outer ring portion extending outward from the lower periphery of the middle ring wall. The lock seat bottom surface rests on the outer ring portion 32, and the inner ring portion rests on the outer flange. The outer periphery of the outer ring part extends downwards to form an outer peripheral wall 31, and an arc notch 33 is concavely arranged on the bottom wall of the outer peripheral wall.
The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.
Claims (9)
1. Be used in two lock nut devices of autotomying of pedicle of vertebral arch screw, its characterized in that: comprises a locking seat and a self-breaking screw rod; the outer peripheral wall of the locking seat is provided with external threads, the locking seat is provided with a through groove which penetrates up and down, and the through groove is provided with internal threads; the self-breaking screw comprises a screw section and a self-breaking part fixedly connected with the screw section, wherein the fixedly connected self-breaking part can be automatically broken when the locking force is greater than a preset value, and the screw section is provided with an outer flange; the self-breaking screw rod passes through the through groove of the locking seat from bottom to top, the screw rod section is in threaded connection with the through groove, and the locking seat can be propped against the outer flange of the screw rod section.
2. The self-breaking double lock nut assembly for pedicle screws as claimed in claim 1, wherein: the bottom of the screw section is annularly protruded outwards to form the outer flange, and the outer flange is of an annularly protruded structure.
3. The self-breaking double lock nut assembly for pedicle screws as claimed in claim 1, wherein: an outer conical wall with a small upper part and a large lower part is arranged outside the screw section, the outer conical wall is positioned on the outer flange, and an inner conical wall matched with the outer conical wall is arranged at the bottom of the penetrating groove.
4. The self-breaking double lock nut assembly for pedicle screws as claimed in claim 1, wherein: the bottom surface of the locking seat is concavely provided with a groove, the bottom of the groove is concavely provided with the through groove, and the bottom of the groove is supported against the outer flange.
5. The self-breaking double lock nut device for pedicle screws as claimed in claim 1, 2 or 3, wherein: still include the compact heap, this compact heap is equipped with the through-hole, and this from breaking screw rod up passes the through-hole of compact heap and the through groove and the screw rod section spiro union of lock connection seat from bottom to top and is passing through the groove, and this lock connection seat, compact heap and outward flange prop according to the preface and lean on from top to bottom.
6. The self-breaking double lock nut assembly for pedicle screws as claimed in claim 5, wherein: the bottom surface of the locking seat is concavely provided with a groove, the bottom of the groove is concavely provided with the through groove, the bottom of the groove is supported on the pressing block, and the pressing block is propped against the outer flange.
7. The self-breaking double lock nut assembly for pedicle screws as claimed in claim 5, wherein: the pressing block comprises an inner ring portion, a middle ring wall and an outer ring portion, wherein the middle ring wall extends downwards from the outer periphery of the inner ring portion, and the outer ring portion extends outwards from the lower periphery of the middle ring wall.
8. A self-breaking double lock nut assembly for use with a pedicle screw as claimed in claim 7, wherein: the bottom surface of the locking seat is concavely provided with a groove, and the bottom of the groove is concavely provided with the through groove; the bottom surface of the locking seat is supported on the outer ring part, and the inner ring part is propped against the outer flange.
9. A self-breaking double lock nut assembly for use with a pedicle screw as claimed in claim 7, wherein: the outer peripheral edge of the outer ring portion extends downwards to form an outer peripheral wall, and an arc-shaped notch is concavely formed in the bottom wall of the outer peripheral wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920670873.1U CN210384017U (en) | 2019-05-10 | 2019-05-10 | Self-breaking double-lock nut device for pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920670873.1U CN210384017U (en) | 2019-05-10 | 2019-05-10 | Self-breaking double-lock nut device for pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210384017U true CN210384017U (en) | 2020-04-24 |
Family
ID=70344657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920670873.1U Active CN210384017U (en) | 2019-05-10 | 2019-05-10 | Self-breaking double-lock nut device for pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210384017U (en) |
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2019
- 2019-05-10 CN CN201920670873.1U patent/CN210384017U/en active Active
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